Description : Pick out the wrong statement about a streamline. (A) It is always parallel to the main direction of the fluid flow (B) It is a line across which there is no flow and it is ... any two streamlines can be considered to be in isolation and the streamline spacing varies inversely as the velocity
Last Answer : (A) It is always parallel to the main direction of the fluid flow
Description : Velocity at a certain point in case of streamline flow is (A) Constant (B) Independent of time (C) Both (A) & (B)
Last Answer : (C) Both (A) & (B)
Description : Uniform flow occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at ... fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure
Last Answer : Answer: Option C
Description : A streamline is defined as the line (A) Parallel to central axis flow (B) Parallel to outer surface of pipe (C) Of equal velocity in a flow (D) Along which the pressure drop is uniform
Description : True one-dimensional flow occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same ... fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
Last Answer : Answer: Option A
Description : Non uniform flow occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at ... The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
Description : Steady flow occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at successive ... fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
Last Answer : Answer: Option B
Description : The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is (A) 0.5 (B) 1 (C) 2 (D) 0.66
Last Answer : (A) 0.5
Description : Velocity distribution for flow between two fixed parallel plates (A) Varies parabolically across the section (B) Is constant over the entire cross-section (C) Is zero at the plates and increases linearly to the mid-plane (D) None of these
Last Answer : (A) Varies parabolically across the section
Description : The continuity equation in ideal fluid flow states that (A) Net rate of inflow into any small volume must be zero (B) Energy is not constant along a streamline (C) Energy is constant along a streamline (D) There exists a velocity potential
Last Answer : (A) Net rate of inflow into any small volume must be zero
Description : A streamline is (A) The line connecting the mid-points of flow cross-sections (B) Defined for uniform flow only (C) Drawn normal to the velocity vector at every point (D) Always the path of a particle
Last Answer : (C) Drawn normal to the velocity vector at every point
Description : A streamline is a line in flow field, (A) That is traced by all the fluid particles passing through a given point (B) Along which a fluid particle travels (C) Such that at every point on it, the velocity is tangential to it (D) None of these
Last Answer : (C) Such that at every point on it, the velocity is tangential to it
Description : Two dimensional flows occurs when (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at ... fluid particles move in plane or parallel planes and the streamline patterns are identical in each plan
Last Answer : Answer: Option D
Description : In case of Couette flow, the fluid flow is between two large flat parallel plates with (A) Top plate moving and the bottom plate fixed (B) Bottom plate moving and the top plate fixed (C) Both the plates fixed (D) Both the plates moving
Last Answer : (A) Top plate moving and the bottom plate fixed
Description : The force which opposes the relative motion between different layers of liquid or gases is called – (1) Critical Velocity (2) Streamline Flow (3) Terminal Velocity (4) Viscous Force
Last Answer : (4) Viscous Force Explanation: Critical Velocity – The maximum velocity upto which fluid motion is streamline is called Critical Velocity. Streamline Flow – If velocity of all fluid particles is same all the time then it can be said in streamline flow.
Description : Which of the following statement is wrong? (A) A flow whose streamline is represented by a curve is called two dimensional flow. (B) The total energy of a liquid particle is the sum of potential energy, ... (D) A pitot tube is used to measure the velocity of flow at the required point in a pipe.
Description : According to Bernoulli's equation for steady ideal fluid flow (A) Principle of conservation of mass holds (B) Velocity and pressure are inversely proportional (C) Total energy is constant throughout (D) The energy is constant along a streamline but may vary across streamlines
Description : Consider the following statements : 1. There is no flow across a streamline 2. Streamline spacing varies directly with velocity at the section 3. Streamlines do not cross 4. In steady flow, streamline pattern does not change with ... 4 (b) 1 and 2 only (c) 1, 3 and 4 only (d) 2, 3 and 4 only
Last Answer : (c) 1, 3 and 4 only
Description : In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity) (A) Vavg (B) 1.2 Vavg (C) 1.5 Vavg (D) 1.8 Vavg
Last Answer : (B) 1.2 Vavg
Description : Pick out the wrong statement pertaining to fluid flow. (A) The ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid in circular pipes is 0.5 (B) The Newtonian ... at the centre of the pipe (C) Navier-Stokes equation is applicable to the analysis of viscous flows
Last Answer : (A) The ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid in circular pipes is 0.5
Description : For turbulent flow of Newtonian fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is (A) 0.5 (B) 1 (C) 0.66 (D) < 0.5
Last Answer : (B) 1
Description : A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10 -3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is (A) 10 KPa (B) 20 KPa (C) 30 KPa (D) 40 KPa
Last Answer : (B) 20 KPa
Description : Which of the following exemplifies a three dimensional fluid flow? (A) Fluid flow at the inlet to a nozzle (B) Fluid flow between parallel plates (C) Viscous fluid flow between converging plates (D) None of these
Last Answer : (A) Fluid flow at the inlet to a nozzle
Description : In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a ... occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)
Last Answer : (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder
Description : In frictional fluid flow, the quantity, (P/ρ) + (V 2 /2gc) + gz/gc) is (A) Constant along a streamline (B) Not constant along a streamline (C) Increased in the direction of flow (D) None of these
Last Answer : (B) Not constant along a streamline
Description : If in a flow field, between any two points, then the flow must be (A) Steady, incompressible, irrotational (B) Steady, compressible, irrotational (C) Steady, compressible and along a streamline
Last Answer : (A) Steady, incompressible, irrotational
Description : __________ flow means the flow of incompressible fluid with no shear. (A) Potential (B) Streamline (C) Creep (D) Boundary layer
Last Answer : (A) Potential
Description : What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition? (A) 0.5 (B) 0.67 (C) 1 (D) 2
Last Answer : (D) 2
Description : he pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe ... then the pressure drop in this case will be (A) Δp (B) 2Δp (C) Δp 2 (D) Δp/2
Last Answer : (B) 2Δp
Description : . In case of turbulent flow of fluid through a circular pipe, the (A) Mean flow velocity is about 0.5 times the maximum velocity (B) Velocity profile becomes flatter and flatter with ... , shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more
Last Answer : (D) Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more
Description : What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)? (A) 0.5 (B) 1 (C) 1.5 (D) 2
Description : Pick out the wrong statement: (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer (B) Blowers develop a maximum pressure of 2 atmospheres ( ... factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number
Last Answer : (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads
Description : Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density. (A) Shear stress (B) Shear force (C) Average drag per unit projected area (D) None of these
Last Answer : (C) Average drag per unit projected area
Description : Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V' ratio (B) The extraction per unit ... and its crosssection is wider at the bottom (D) Vander wall adsorption is also called chemisorption
Last Answer : (D) Vander wall adsorption is also called chemisorption
Description : As the reflux ratio in a distillation column is increased from the minimum, the (A) Slope of the operating line in stripping section decreases (B) Number of plates decreases very slowly first ... decreases and then increases (D) Liquid flow increases while the vapor flow decreases for a system
Last Answer : (C) Total cost first decreases and then increases
Description : 1. Having a member of the search team trained to handle digital evidence: a. Can reduce the number of people who handle the evidence b. Can serve to streamline the presentation of the case ... the opportunity for opposing counsel to impugn the integrity of the Evidence d. All of the above
Last Answer : d. All of the above
Description : A flow in which the quantity of liquid flowing per second is not constant, is called (A) Streamline flow (B) Turbulent flow (C) Steady flow (D) Unsteady flow
Description : A flow whose streamline is represented by a curve, is called (A) One-dimensional flow (B) Two-dimensional flow (C) Three-dimensional flow (D) Four-dimensional flow
Description : A flow whose streamline is represented by a straight line, is called __________ dimensional flow. (A) One (B) Two (C) Three (D) Four
Description : A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called (A) Steady flow (B) Uniform flow (C) Streamline flow (D) Turbulent flow
Description : A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. (A) Steady (B) Streamline (C) Turbulent (D) Unsteady
Description : Uniform flow occurs when (A) The flow is steady (B) The flow is streamline (C) Size and shape of the cross section in a particular length remain constant (D) Size and cross section change uniformly along length
Description : A large Reynold number is indication of (A) Smooth and streamline flow (B) Laminar flow (C) Steady flow (D) Highly turbulent flow
Description : The flow in which each liquid particle has a definite path and their paths do not cross each other is called (A) One dimensional flow (B) Streamline flow (C) Steady flow (D) Turbulent flow
Description : The flow through an open system is _________ if all properties at each point within the system remain constant with respect to time. a. streamline flow b. steady flow c. constant flow d. algebraic flow
Last Answer : steady flow
Description : The process of one substance mixing with another because of molecular motion is called _________. a. diffusion b. viscosity c. streamline flow d. solution
Last Answer : diffusion
Description : Define. i) Streamline flow ii) Turbulent flow Give significance of Reynold’s number.
Last Answer : i) Streamline flow The flow of liquid in which every particle of liquid moves in the same direction of flow of liquid is called streamline flow. ii) Turbulent flow The flow of liquid in which every ... to 3000 liquid flow is unstable. (3)When R is greater than 3000 liquid flow is turbulent.
Description : Distinguish between streamline and turbulent flow of liquid.
Last Answer : Stream line flow Turbulent flow The path of every particle is same The path of every particle is different The velocity of particle is constant in magnitude and direction The velocity of particle at each point is ... . V < vc V > vc R < 2000 R > 3000
Description : Distinguish between streamline flow and turbulent flow.
Last Answer : Stream line flow Turbulent flow The path of every particle is same The path of every particle is different The velocity of particle is constant in magnitude and direction The velocity of particle at each point ... V < vc V > vc R < 2000 R > 3000
Description : The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is (A) 0.3 (B) 0.9 (C) 0.03 (D) 0.66
Last Answer : (A) 0.3